Alvan stewart richmond



(No Model.)

A. S. RICHMOND.

DENTAL APPARATUS.

Patented Jan. 3', 1893.-

A'itorneyn UNITED STATES PATENT OFFICE.

ALVAN STEIVART RICHMOND, OF NEW YORK, N. Y., ASSIGNOR TO JOHN S. HUYLER,OF SAME PLACE.

DENTAL APPARATUS.

SPECIFICATION forming part of Letters Patent No. 489,235, dated January3, 1893. Application filed June 12, 1891- Serial No. 39 6,028. (Nomodel.

To all whom it may concern.-

Be it known that I, ALVAN STEWART RICH- MOND, a citizen of the UnitedStates, residing at New York, in the county and State of New York, haveinvented certain new and useful Improvements in Dental Apparatus, ofwhich the following is a specification.

My invention relates to an improved dental apparatus designed moreespecially for use in the application or introduction of heated air orgas either medicated or not to the tooth that is under treatment forobtunding sensitive cavities in teeth in their preparation for filling.

It has for its object to provide a simple, cheap, portable, andconvenient device,whereby this object may be accomplished, and itconsists in the construction and arrangement of parts, substantially ashereinafter more particularly pointed out.

In the accompanying drawings, I have illustrated the preferredembodiment of my invention, some of the parts being shown in section.

I provide a simple, portable, and inexpensive apparatus, consistingessentially of a tube A, preferably having its free end bentforthe.

purpose of directing the blast more conveniently to the desired point,and connecting this tube by a suitable hose or pipe B, to a source 0 ofsupply for the air or gas. In order that the air or gas may be heatedsufficiently, and maintained at the desired temperature at a longer timethan by simply heating the tube, I apply to the free end of the tube, abulb, bushing, or swell D, which may be of any suitable material thatcan retain the heat for a comparatively long time. A copper bulb willhold the heat for a considerable length of time, enough to cause the airor gas flowing through the pipe to be beated to the desired degree, andthe temperature is maintained for a considerable length of timesufficient to produce the obtunding effect. This bulbmay be fixed on thetube, or may be loose, and While I prefer to make it of copper, anyother suitable material may be used, and the bulb or bushing may be ofany desired shape, the essential feature being that there shall be amass of heat retaining material surrounding the tube tending to maintainthe heat applied thereto a greater or less degree.

In some instances, I find it desirable to use in connection with theheated air or gas some obtundent escharotic or essential oil or thelike, and for this purpose, I connect with the tube a barrel or chamberE, in which the medicament may be placed, and through or over which theair is caused to pass. If the medica- 6o mentis in the form of aliquid,it may be conveniently inserted in the chamber by saturating anabsorbent material as cotton or the like, or any other ordinary meansmay be employed to hold the medicament in the chani- 6 ber, and to causeit to give off its vapors or fumes as the air is forced through or overit. I have shown this barrel or chamber interposed between the hose orpipe B, and the tube A, the latter being fitted to screw into the heatedtube, I use an ordinary fountain bulb F made of rubber, andhavingsuitable valves G, H, connected with a receiving chamher I into whichthe air is forced by the bulb F faster than it can flow out of thechamber,

and this chamber being of elastic material, So

will cause a practically continuous and steady flow of air or gasthrough the tube. In order to prevent this chamber expanding beyondasafety limit by an undue pressure or forcing of the air into it, it iscovered with a net work 8 .I of suitable material which will limit itsexpansion.

Located in the hose at any suitable point, is a valve K of any suitableconstruction, that shown consisting of a simple disk 7c of rubber 9oinclosed between the parts of the valve, one portion being slitted as atK to allow the flow of the air or gas through it when the valve islifted from its seat. Any other suitable form of valve may be used inthe pipe or in the 5 bulb and receiving chamber, the form shown however,has proved satisfactory in this.class of apparatus.

Connected to the tube or chamber is a suitable attaching device L shownin the form of a book by means of which the tube and its attached bulbor bushing may be readily suspended in connection with any desiredheating appliance.

The operation of the instrument will be readily understood by thoseskilled in the art, it being understood that the tube and its attachedbushing or bulb are heated in any convenient way, and then the point ofthe tube is directed to the tooth, or other part to be operated upon.Pressure upon the force or pump bulb F charges the chamber H with air orgas which is forced through the barrel E taking up any medicamentthatmay be therein, and thence through the heated tube where its temperatureis raised to the desired degree, and conveyed to the point or cavity tobe operated upon." This results in dehydrating or obtunding it to apoint of non sensitiveness by the action of the heated air or gas, andthe therapeutic influence of the medicament, when the tooth can beoperated upon bulb and a receiving chamber connected to the force bulband to the tube, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. 7

ALVAN STEWART RICHMOND.

Witnesses:

RuDoLF KRI'JGER, J. W. APPLETON.

